tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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unroll1.js (1292B)

      1 // |jit-test| test-also=--setpref=wasm_unroll_loops=true
      2 
      3 // Loop unrolling test: 2 exiting values, 1 exit target => can be unrolled.
      4 
      5 let t = `
      6 (module
      7  (func (export "f1") (param $limit i32) (result i32)
      8    (local $x i32)
      9    (local $y i32)
     10    (local.set $x (i32.const 1))
     11    (local.set $y (i32.const 1000))
     12    (loop $cont
     13       ;; x = x + 1
     14       (local.set $x (i32.add (local.get $x) (i32.const 1)))
     15       ;; y = y - 7
     16       (local.set $y (i32.sub (local.get $x) (i32.const 7)))
     17       ;;
     18       (br_if $cont (i32.lt_u (local.get $x) (local.get $limit)))
     19    )
     20    (i32.mul (local.get $x) (local.get $y))
     21  )
     22 )`;
     23 
     24 let i = new WebAssembly.Instance(new WebAssembly.Module(wasmTextToBinary(t)));
     25 
     26 // Run the loop some varying number of times, with the aim of exiting it at
     27 // each copy of the loop, so as to check that the post-loop values of `x` and
     28 // `y` are correct, regardless of which copy of the original loop exited.
     29 
     30 assertEq(i.exports.f1(100), 9300);
     31 assertEq(i.exports.f1(101), 9494);
     32 assertEq(i.exports.f1(102), 9690);
     33 assertEq(i.exports.f1(103), 9888);
     34 assertEq(i.exports.f1(104), 10088);
     35 assertEq(i.exports.f1(105), 10290);
     36 assertEq(i.exports.f1(106), 10494);
     37 assertEq(i.exports.f1(107), 10700);
     38 assertEq(i.exports.f1(108), 10908);
     39 assertEq(i.exports.f1(109), 11118);